Every Odoo sales team managing customer quotations, service contracts, or negotiated pricing has hit the same wall — the price_subtotal field on Odoo sale order lines is locked by default and cannot be edited directly.

When customers agree on a fixed total for a line item, sales teams are forced to manually reverse-engineer the unit price. This creates real workflow problems:

• Cannot enter a negotiated line total directly — must calculate unit price manually
• Discount + quantity combinations make back-calculation error-prone
• Sales reps waste time on arithmetic instead of closing deals
• Quotation turnaround slows when every line needs price gymnastics
• Fixed-price service contracts require awkward unit price workarounds
• Odoo implementers spend hours on bespoke development just to unlock a single field

Sale Line Subtotal Editable unlocks the price_subtotal field on Odoo 19 sale order product lines, letting you type the total amount directly.

Odoo automatically back-calculates the correct unit price based on quantity and discount percentage. Tax amounts and order totals update instantly. Type the subtotal. Save. Done.

Already-invoiced lines are automatically locked — preventing accidental modification to price_subtotal on lines where qty_invoiced > 0, maintaining complete accounting consistency between your sale orders and customer invoices.

• ✔ Sales managers and reps using Odoo 19 for customer quotations
• ✔ Service businesses quoting fixed-price project totals
• ✔ Account managers handling negotiated pricing on sale orders
• ✔ Odoo implementers and consultants delivering clean SO workflows
• ✔ Businesses with volume discount or tiered pricing models
• ✔ E-commerce and wholesale companies managing bulk order pricing
• ✔ Any Odoo user needing direct price_subtotal editing on SO lines

Available in the Odoo 19 Apps Store

Sale Line Subtotal Editable (vizion_so_line_total_editable) by Vizion Tools in the Odoo 19 Apps Store under the Sales category — one-click install, zero configuration.

Live Demo: Editing price_subtotal on Sale Order Lines

Live demonstration of direct price_subtotal editing on Odoo 19 sale order lines, with automatic unit price back-calculation and invoiced line locking — vizion_so_line_total_editable in action.

The module extends the sale.order.line model with a smart inverse method on the price_subtotal field, enabling direct editing while maintaining full computation integrity.

How the Back-Calculation Works:

1. You type a subtotal value on a sale order product line.
2. The inverse method divides by quantity and discount factor to derive price_unit.
3. price_tax and price_total are recomputed using Odoo's tax engine.
4. The pricelist is preserved — technical_price_unit is intentionally kept separate to prevent pricelist overrides.

View Inheritance:

• sale.order form view — editable price_subtotal on the embedded SO line tree inside the sale order form
• Readonly condition: display_type or qty_invoiced > 0 — section/note lines stay read-only, invoiced lines are locked

• No JavaScript widget overrides
• No database migrations
• No performance impact
• No impact on sale order confirmation or invoicing workflows
• No interference with customer pricelist calculations
• No conflict with analytic accounting integration

1. Open the Apps menu in your Odoo 19 instance.
2. Search for sale_line or Sale Line Subtotal Editable.
3. Locate vizion_so_line_total_editable by Vizion Tools.
4. Click Activate.
5. Open any Sale Order or Quotation.
6. Click the Subtotal field on any product line — it is now editable.

No post-install configuration required.